Wide bandwidth digital pre-distortion (DPD) in a remote unit(s) for a wireless communications system (WCS) is disclosed. In embodiments disclosed herein, a remote unit(s) includes at least two transceiver circuits, each configured to process (e.g., perform DPD) a respective downlink digital communications signal corresponding to a portion of the carrier bandwidth. Each of the transceiver circuits is further configured to convert the respective downlink digital communications signal into a respective downlink RF communications signal. The respective downlink RF communications signals generated by the transceiver circuits are subsequently combined to form a downlink RF communications signal(s) associated with the carrier bandwidth. By employing multiple transceiver circuits in the remote unit(s) to each handle a portion of the carrier bandwidth, it may be possible to mitigate processing bandwidth limitations of the remote unit(s), thus making it possible to satisfy the regulatory and/or operational requirements for supporting wide bandwidth communications in the WCS.
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2. The method of claim 1, further comprising passing the first downlink RF communications signal inside the first processing bandwidth and blocking the first downlink RF communications signal outside the first processing bandwidth.
3. The method of claim 2, further comprising providing the first downlink digital communications signal and the second downlink digital communications signal from a central unit to the first transceiver circuit and the second transceiver circuit, respectively.
4. The method of claim 1, further comprising combining the first downlink RF communications signal and the second downlink RF communications signal to generate the at least one downlink RF communications signal.
5. The method of claim 4, further comprising passing the at least one downlink RF communications signal inside the carrier bandwidth and blocking the at least one downlink RF communications signal outside the carrier bandwidth.
7. The method of claim 1, further comprising, in one of the first transceiver circuit and the second transceiver circuit, receiving an uplink RF communications signal and converting the uplink RF communications signal into an uplink digital communications signal.
11. The method of claim 8, further comprising combining the first downlink RF communications signal and the second downlink RF communications signal to generate the at least one downlink RF communications signal.
12. The method of claim 11, further comprising passing the at least one downlink RF communications signal inside the carrier bandwidth and blocking the at least one downlink RF communications signal outside the carrier bandwidth.
15. The method of claim 14, further comprising amplifying the first downlink RF communications signal.
16. The method of claim 15, further comprising, in the second transceiver circuit, converting the second downlink digital communications signal corresponding to the second signal bandwidth into the second downlink RF communications signal corresponding to the second processing bandwidth.
18. The method of claim 13, further comprising combining the first downlink RF communications signal and the second downlink RF communications signal to generate the at least one downlink RF communications signal.
19. The method of claim 18, further comprising passing the at least one downlink RF communications signal inside the carrier bandwidth and blocking the at least one downlink RF communications signal outside the carrier bandwidth.
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November 29, 2021
June 13, 2023
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